Hutch was really outstanding last year. But we aren't talking about Hutch. Comrie was good relative to the rest of the AHL. The improvement in his sv% was substantial. I never discuss GAA in relation to goalies.
It is a team stat and only reflects on goalies in that they are part of the team.
Right now I rate Berdin as the better prospect, by a small margin. But stages of development say that Comrie starts in the AHL, Berdin starts in the ECHL, like plenty of other goalies have done.
If he can actually take the starting job away from Comrie, that's a different story. But he hasn't done that yet.